Contact: Hidekazu TSUJI
tsuji(atmark)riam.kyushuu.ac.jp

Subjects of Research
We aim to clarify nonlinear dynamics phenomena in fluids
by deriving model equations under universal laws,
by finding their solutions theoretically or numerically,
and by developing fundamental concepts of the phenomena.
Fundamental topics of fluid dynamics are treated and
recent research topics are as follows:
 Statistical characteristics of turbulence with
a projection operator method;
 Nonlinear characteristics of threedimensional steady
progressive water waves, particularly of its limiting profile;
 Shallow water wave and internal wave in stratified fluid,
particularly twodimensional interaction of solitary waves.

Normalized modal time correlation function as a function of the time normalized by the characteristic time: a solution to the model equation under a similarity assumption (blue); direct numerical simulation (red).


Threedimensional steady progressive limiting water wave
with harmonic resonance.


Twodimensional interaction of internal solitary waves
in twolayer fluid. The largeamplitude solitary wave is
generated by the interaction of two solitary waves.

Members
Makoto OKAMURA(Assoc.Prof.）
Hidekazu TSUJI(Res. Assoc.）
Agung BUDIYONO(Visiting Researcher）
Tomoaki HIRAKAWA(MC2）
Takaomi AKISHIMA(MC1）
(Prof. M. OIKAWA retired in Mar. 2010.)
Graduates
Hidekazu TSUJI(MC,1992)
Yukio HIGO(MC,1993)
Takashi ATOBE(DC,1995)
Masahiro SUETSUGU(MC,1995)
Masaru HIRAYAMA(MC,1996)
Yuki KATO(DC,1996)
Manabu INADA(MC,1997))
Kimihiko SATOH(MC,1997)
Yoshihisa NAGAKI(MC,1999)
Yutaka WADA(MC,1999)
Kenichi MARUNO(DC,1999)
Kazuto UENO(DC,1999)
Takumi OHKIDO(MC,2001)
Kenji SATOH(MC,2001)
Yoichi KITAHARA(MC,2003)
Kazuhisa OHTSUBO(MC,2003)
Hiroyuki NAGATANI(DC,2007)
Tsuneo SUZUMURA(MC,2007)
Tomoyuki KUBOTA (MC,2008)
Ayumi SAEKI(DC,2010）
Masahiko TANAKA(DC,2010）
Titles of Graduation Thesis
Master Course
Analtical solution of KP II equation
Water wave in cylindrical container with vertical forcing
Analytical study of resonant interaction of the long and short waves
Pattern formation of waterway
Application of the nonlinear system theory to the control of rigid body
A study for largescale properties of the KuramotoSivashinsky equation by a projection operator and numerical simulations
Evaluation of mean values for a forced pendulum with a projection operator method
Numerical simulation for interfacial phenomena using VOFPLIC method
Numerical solution for SwiftHohenberg type equation
Chaos generated by the faraday resonance in twodimensional standing waves
Generation by the topograohic effect in the twolayer fluid with infinite depth
Effect of Halo on the density flow model in spiral structure of galaxy
Stability of the flow between the eccentric rotating cylinders
Analysis of the discrete nonlinear integrable systems by Singularity Confinement Method
Higher approximation for resonant interaction of the long and short waves
Frequecy downshift in the nonlinear modulational wave
Dynamics of the fluid particle with the lee waves in the periodic flow
Lagrangian Chaos in the unsteady flow between two eccentric cylinders
Solitons in the twolayer fluid and their interactions
Ph.D Course
Modeling and Numerical Simulation of Formation of Waterway Network
Singularity Analysis and Hirota's Bilinear Method for Nonlinear Discrete Systems
Scaling law related to the Kolmogolov's turbulent theory and application to model of intermittency
Stability of the steady progressive capillarygravity wave
Lagrangian Chaos in the unsteady flow between two eccentric cylinders
